Burning-in machine



v Apnl' 19, 1927. LORENZ BURNI NG IN MACHINE- Filed March 6. 1.926

I INVENTOR A ORNEY Patented Apr. 19, 1927.

UNITED STATES Louis LORENZ, OF NEW YORK, n. Y.

BURNING-IN MAQHINE.

Application filed March 26, 1926.

This invention relates generally to an apparatus for etching plates used in connection with the photoengraving and allied processes. 7

The invention having more particular reference to a novel type of apparatus for use in treating etching plates composed of metal sheets with selected portions of a side thereof covered with erosive resisting coating.

The invention has for an object the provision of an improved apparatus of the class described embodying novel construction and arrangement of parts.

For further comprehension of the inven tion, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invent-ion are more particularly set forth.

Fig. 1 of the drawing shows a front elevational view of my improved apparatus.

Fig. 2 shows a side elevational view thereof.

Fig. 3 shows a rear elevational view thereof.

Fig. 4 shows longitudinal view of the tray and heating device, as used in connection with my improved apparatus.

Fig. 5 shows a top plan view of the heating device as used in connection with my improved device.

Fig. 6 shows a longitudinal sectional view taken on the line 6-6 of Fig.

As here embodied my improved apparatus comprising a stand or frame work having upright members 10 with base portions 11, attached thereto at their lower extremities, and cross supporting members 12 convcniently located, and diagonal braces 13. The dome 14, preferably of sheet metal, is attached to the upper extremities of the upright members 10, and has a centrall located protruding portion let, of hollow construction. The above described construction being such as will support the hereinafter mentioned and described elements of my improved apparatus.

The tray consists of a frame '16, preferably angle shaped met-al, to support a bottom 17, and upper extended sides 18. It being understood that the above mentioned construction is such as will accomodate the Serial No. 97,590.

adapted to receive the heating elements 25,

preferably of nichrome wire, close wound, attached to the said terminal bars 20, as at 26. it being understood that the terminal bars 26, having suitably attached thereto the electric wires 27 and 28 which are suitably attached to the ammeter-voltmeter 60, the fuses 61, and the switch 62, conveniently attached to the front of the said frame work, and that the switch 62 is connected to a suitable, convenient source of electric current. The latter mentioned elements being those of ordinary, common construction such as generally used for apparatus of this nature, any suitableconvenient source of electric current. The above mentioned construction being such as will permit the said current to heat the heating elements 25, so as to heat the said etching plates and the said liquid, in the heretobefore mentioned tray, to the desired temperature, so as to erect the said etching plates by burning in the said liquid as may be required.

The above mentioned tray, and the above mentioned heating device, have attached thereto, and depending therefrom pins 29, adapted to receive sockets 30, formed in the blocks 31 and 32, which are attached as at 38 to the cross supporting members 12 of the said frame work. The above mentioned construction being such as will allow the 109 attached, as at 38, at or near the center of the said tray. The said lever 37 has a protruding portion 39, at a right angle thereto, and adapted to engage the said lever 3%, when the said heating element has been pivotally raised the desired amount, so as to pivotally raise the said tray and the desired amount when the said tray is pivotally raised higher. The above mentioned mechanism being provided to facilitate the placing of and removal of the etching plates before and after treatment, and also to facilitate the inspection of the said heating device.

it will be further understood that a flexie member 40, preferably suitable steel pe, is attached at one extremity, to the ree extremity of the said tray, as at 41, and 8 extended over pulleys 42, preferably of iat, flanged construction, and rotatively mounted in the said frame work, the said flexible member 40 being attached at its other extremity, as at 43, to a suitable counterweight a l, located in one of the said upright memoers 10, as clearly shown in the accompanying drawing. The above described construction being such as will decrease the eifort required to pivotally raise the said tray and the said heating device.

It will be further understood that the electric motor 46, is located in the said dome 14c, and upported therein by supporting members 47, attached to the uprights 418, which are carried by the said frame work. The electric motor 46 is adapted to operate with its shaft 49 in a vertical position, the fan 50, of suitable size, is attached to the said shaft 4-9. It being understood that the electric motor d6 is suitably connected to any suitable convenient source of electric current, and that the said fan 50 is located directly below the said protruding portion 14; of the dome 14. The above described construction being such as will permit the fan 50 when rota-ted or revolved by the electric motor 46 to create a partial vacuum, which will draw the heat and fumes from the said tray and from the said heating device through the protruding portion 14, which may be suitably connected to pipes or the like leading outside the building, housing my improved apparatus.

lVhile I have above described the preferred form, construction and arrangement of the several elements employed, it will be understood that the device is nevertheless, susceptible of considerable modification therein, and I therefore reserve the privilege of resorting to all such changes as may be fairly embodied within the spirit and cope of the invention as claimed.

Having thus described my invention. what I claim as new and desire to protect by Letters Patent of the United States is as follows 1. An apparatus for treating etching plates composed of metal sheets with a selected portion of a side thereof covered with erosive resisting coating, comprising a frame work adapted to pivotally support a tray and a heating device.

2. An apparatus for treating etching plates composed of metal sheets with a selected portion of a side thereof covered with erosive resisting coating, comprising a frame work adapted to pivotally support a tray and a heating device, said heating device located below the said tray, said heating device attached to the said tray and pivoted levers, so as to pivotally raise the said heating device when the said tray has been partly raised.

3. In. a device of the class described a frame work adapted to support a dome having an extended hollow portion, an electric motor operatively attached to a fan, said electric motor located in the said dome, said fan located directly below the said extended hollow portion of the said dome.

4i. In a device of the class described a heating device consisting of a frame having terminal bars located crosswise thereof, adjacent to and supported from the said frame by depending brackets, supporting members located crosswise of the said frame and spaced therein, and supported therefrom, and having attached thereto supporting pieces depending upward therefrom, and provided with a plurality of apertures spaced therein, and adapted to receive heating elements attached to the said terminal bars.

5. In a device of the class described, a tray and a heating device. having attached thereto and depending therefrom socket members adapted to receive socket-s, formed in blocks, attached to cross supporting members of a frame work.

6. In a device of the class described, a tray having pivotally attached at its center, a lever, said lever also pivotally attached to a second lever pivotally attached, at the center of a heating device, the said second lever having a protruding portion at a right angle thereto, adapted to receive the said lever when the said tray has been pivotally raised a desired amount, so as to pivotally raise the said heating device, when the said tray is pivotally raised higher.

7. In a device of the class described, a tray and a heating device, having attached thereto and depending therefrom socket members adapted to receive sockets, formed in blocks, attached to cross supporting members of a frame work, said tray having pivotallynttached at its center a lever, said lever also pivotally attached to a second lever pivotally attached, at the center of a heating device, the said second lever havmg a protruding portion at a right angle thereto, adapted to receive the said lever ible member attached at its other extremity when the said tray has been pivotallyraised to a counter Weight slidably mounted in desired f b 50 45 to p y l f guides attached to the said frame Work, said sfifid g m when H13 Sald y 18 tray and a heating device pivotally attached P Y lalsed g t0 the said frame Work, and attached by piv- 15 8. In a device of the class described, a t d l v r to ach other.

flexible member attached at one extremity I t stimony whereof I have afiixed my to the free extremity of a tray, said fieXisignature.

ble member extended over pulleys, rotatively mounted in a frame Work, said flex- LOUIS LORENZ. 

